SOLUTION: a ladder makes an angle of 60 degree and reaches a height of 20 dm on the wall . what is the length?

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Question 1023461: a ladder makes an angle of 60 degree and reaches a height of 20 dm on the wall . what is the length?


Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Sixty degrees where? At the ground away from the wall?
L for length of the ladder;
20%2FL=sin%2860%29

L%2F20=1%2Fsin%2860%29

L=20%2Fsin%2860%29


L=20%282%2Fsqrt%283%29%29
L=40%2Fsqrt%283%29

Or if you prefer
L=40%2Asqrt%283%29%2F3
L=%2840%2F3%29sqrt%283%29